- All sections
- D - Textilespaper
- D21H - Pulp compositionspreparation thereof not covered by subclasses , impregnating or coating of papertreatment of finished paper not covered by class or subclass paper not otherwise provided for
- D21H 17/65 - Acid compounds
Patent holdings for IPC class D21H 17/65
Total number of patents in this class: 69
10-year publication summary
|
6
|
8
|
6
|
3
|
3
|
6
|
4
|
3
|
6
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kemira Oyj | 1228 |
11 |
| Stora Enso Oyj | 1665 |
6 |
| Ahlstrom Oyj | 147 |
4 |
| Linde Aktiengesellschaft | 1483 |
3 |
| Algalife Ltd. | 6 |
3 |
| Kimberly-clark Worldwide, Inc. | 5323 |
2 |
| ESKA B.V. | 25 |
2 |
| First Quality Tissue, LLC | 156 |
2 |
| Innventia AB | 34 |
2 |
| International Paper Company | 749 |
2 |
| Kemira Chemicals, Inc. | 80 |
2 |
| Solenis Technologies, L.P. | 313 |
2 |
| UPM-Kymmene Corporation | 956 |
2 |
| World Centric | 59 |
2 |
| Novatrust SA | 3 |
2 |
| BASF SE | 21137 |
1 |
| Akzo Nobel N.V. | 166 |
1 |
| Datalase Ltd. | 109 |
1 |
| Eka Chemicals AB | 17 |
1 |
| Fibertus Oy | 1 |
1 |
| Other owners | 17 |